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Ford 9", 3.812", HD Nitro Billet Aluminum 3rd Member Housing & Pinion Support
9" HD 3.812" Billet Alum 3rd Member & Pinion Support

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Price: $3,440.00

Product Code: NPDOF9-BILLET-40

Description Warranty Information

Ford 9" / 10", 3.812" Bore
HD Nitro Pro Billet Aluminum 3rd member Housing & Pinion Support

Differential: Ford 9" Based
Gear Ratio: All 9.5" & 10" Pro Gears
Carriers: Nitro Spool
Manufacturer: Nitro Gear & Axle
Warranty: Race Parts-Warranty

Tech Note:
Racing, Offroad, and hardcore Fits include Dragrace, Ultra4, Trophy Truck, Prerunner, Diesel Drag, Ect.
Use with large Journal full spool FSF9-40-2-25, Nitro 10" Grears, and MKF9BILLET-3-8 install kit.

These units use an oversize 3.812 carrier bearing bore allowing larger/thicker bearing journals when installing a 40 spline spool. The pinion support uses 10 high strength studs and accepts larger 35 spline pro gear type pinions.

Main bearing caps feature US made high strength studs with inserts in the aluminum main housing to locate and properly secure them. Supplied adjuster nuts are heat treated billet as well. Designed specifically to enhance the longevity of race gears these 3 generation billet assemblies are engineered for maximum performance in extreme Fits and look good at the same time.

Manufactured right here in the U.S. of A., these billet aluminum beauties are CNC machined from aircraft quality 6061-T6 solid billet aluminum. The bearing main caps are then CNC machined from 6061-T6 solid billet aluminum and matched to the housings. Not only does the aluminum add considerably to the overall strength of the 3rd member but at 20-30% less weight than a nodular iron drop-out.

Engineered to vastly increase rigidity of the pinion bearings these units reduce flex resulting in better gear contact and strength under extreme loads. Further stiffening is accomplished via a load bolt supporting the ring gear and maximum internal webbing around the 3 Nitro's extreme engineering has produced features like a load bolt for increased resistance to pinion deflection.

Nitro Gear & Axle strives to provide the highest quality differential & axle components available. We take the steps necessary to ensure our parts are dependable. Our product range is continually growing to meet the needs of consumers for new ratios and Fits. At Nitro we know differentials, and know what it takes to provide you with high quality components.

Nitro Gear and Axle Premium Differential Ring and Pinion Gears, Axles and parts


This product can expose you to chemicals including toluene and benzene, which are known to the State of California to cause cancer and birth defects or other reproductive harm.
For more information go to: www.P65Warnings.ca.gov

  • State of the art CNC machined parts
    Housing body cut from solid 6061 T6 billet aluminum
    Main Caps cut from solid 7075 T6 billet aluminum.
    High-strength load bolt to prevent deflection
    Pre-drilled and tapped for ARB air locker-air line fitting and includes a plug if not using an ARB
    Accepts Ford 9.5” or 10" Nitro Pro Ring & Pinion sets, 35 spline pinion
    40 spline Full Spool or ARB
    Far stronger than other OE, Aftermarket Aluminum or Iron Dropout housings
    20-30% lighter than nodular iron drop-outs
    Greater heat dissipation from aluminum vs. iron keeps your oil and gears cooler and lasting longer
    Compact bearing main cap design allows fitment in any stock or aftermarket Ford 9" housing
    Precision machined parts improve gear set-up pattern consistency
    Made in the USA

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